Nailing machine for shoes



' Dec. 14', 1926.

NAILING MACHINE FOR SHOES Filed Jan. 22. 1926 Patented. Dec. 14, 1926.

UNITED 'stares BRUNO HOLZHTER, or HEIDELBERG, GERMANY.

NALING MACHINE FOR SHOES.

Application led January 22, 1926. Serial No. 83,037. and in Germany April 30, 1925.

rl`his invention relates to a shoe-nailing machine in which the nailing` is done .in oblique direction simultaneously in tvvo rows, the nails in the one row beingl displaced with regard to the nails in the other roW. By

this kind of nailing' a much greater durability of the nailed sole is obtained than formerly and by the nailingl in two rows simultaneously the efliciency of the machine is considerably increased.

An embodiment of the invention is shown, by Way of example, in the accompanying drawing in Which- Fig. l shows the machine in side elevation and Fig. 2 is a front end view.

In the frame-like casinal a a shaft o is horizontally journalled in ball bearings, On one end of shaft Z) two belt pulleys c, (Z are keyed. The belt pulley Z is constructed to form a clutch element on its inner surface, the other clutch element f shiftably mounted on shaft Z) being pressed by the action of a spring g into engagement with the clutch element (Z. A grooved disk Zt having` a cam t' on its inner surface is arranged inside the frame a. The cam "Z is designed to act upon a roller Za listed on a lever Z. The outer end ot lever Z, projecting` from the frame a, ishingedly connected with a clutch lever m.

By the rotation of a ,ofrooved disk Z1 a rack n, movably mounted in the upper portion of frame a is shifted to and fro through the intermediary of a roller 0, so that toothed Wheels 79 are rotated which raise and lower tool holders if'. In the head of the machine four tool holders i" are arranged, two for holding the pricking tools and two for holding' the inserting tools. At every Working` phase the corresponding pair of tool holders is in engagement with the toothed Wheels p and g, the other pair of tool holders beingl shifted in lateral direction by the rotating` eccentric zengaging With the guides of the tool holders, so that the toothed Wheel cannot gear with the shifted tool holders.

The eccentric u acts upon a lever Which operates the knife w which severs the pegs fed the knife in the shape of a strip, the cut off pegs being held in the position to be driven in. The shoe on a last or horn arranged underneath the nail head is move( at the pegiging or nailing by a catch s arranged on a lever l oscillatably mounted on a bolt 2 having a spherical head and moved in lateral direction by an eccentric 3 and in vertical direction by an eccentric 4.

A rod 5 hingedly iiXed to the lever Z is operated by means of a pedal (not shown) and shifts the clutch element f When the pedal is being` depressed so that the clutch coupling` is disengaged. When the pedal is further depressed the clutch element 7 is pressed on a ring 6 whereby the machine is stopped.

I claim A shoe nailing machine comprising in combination, a head, a pair of tool holders obliquely mounted in said head and carrying tools for piercing` holes in the Work operated upon, a second pair of tools obliquely mounted in said head and carrying tools for inserting pegs in the holes so formed, a main driving shaft, a horizontal rack, a grooved disk on said shaft, a roll carried by said rack engaging thegroove in said disk, gear Wheels operated from said rack, and means for alternately bringing said pairs of tool holders into operative engagement with saidv gear Wheels.

ln testimony whereof I affix my signature.

BRUNO HOLZHKTER. 

